docs: Divi guides shortform/placeholders, hints name the write tools; test: Divi write end-to-end; version 0.3.0

- Hints (PostPresenter::DIVI_NOTE, outline, catalog) and server instructions (tree_rev rule)
  name the Divi write tools; guides divi-shortform and divi-placeholders, additions to
  divi-structure, divi-attrs, overview (tool groups, 'nur lesen'), workflows, content-types.
- D7 wording and the S7 exception in readme, guides and spec 1.3/5.2; readme 0.3.0.
- ToolNamingTest: every referenced guide topic exists; overview lists exactly the topics.
- tests/Integration/divi-write-smoke.sh: all write tools via OAuth, editor without
  unfiltered_html with benign probes (S6), Divi's own save filters on the new fixture
  synthetic-divi-filters.html (S7); admin-render.php accepts the new wrap class.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7

tests/Unit/Guides/ToolNamingTest.php

@@ -96,6 +96,40 @@ final class ToolNamingTest extends TestCase
         }
     }
 
+    /** Every guide topic named in a description, hint or the overview exists as docs/guides/<topic>.md. */
+    public function testReferencedGuideTopicsExist(): void
+    {
+        $root = dirname(__DIR__, 3);
+        $referenced = [];
+        foreach (self::texts() as $path => $text) {
+            if (str_ends_with($path, '.php')) {
+                preg_match_all('/topic \\\\?"([a-z0-9-]+)\\\\?"/', $text, $matches);
+                $referenced = array_merge($referenced, $matches[1]);
+            }
+        }
+
+        self::assertContains('divi-shortform', $referenced, 'lit/divi-insert and lit/content-create name divi-shortform');
+        foreach (array_unique($referenced) as $topic) {
+            self::assertFileExists($root . '/docs/guides/' . $topic . '.md', 'guide topic "' . $topic . '"');
+        }
+    }
+
+    public function testOverviewListsExactlyTheOtherGuideTopics(): void
+    {
+        $root = dirname(__DIR__, 3);
+        $overview = (string) file_get_contents($root . '/docs/guides/overview.md');
+        preg_match('/Weitere Themen:(.*?)\n\n/s', $overview, $section);
+        preg_match_all('/`([a-z0-9-]+)`/', $section[1] ?? '', $listed);
+        $listedTopics = array_values(array_diff($listed[1], ['topic', 'lit-guide']));
+        sort($listedTopics);
+
+        $files = array_map(static fn (string $f): string => basename($f, '.md'), glob($root . '/docs/guides/*.md') ?: []);
+        $files = array_values(array_diff($files, ['overview']));
+        sort($files);
+
+        self::assertSame($files, $listedTopics);
+    }
+
     public function testOverviewListsExactlyTheDirectTools(): void
     {
         $overview = (string) file_get_contents(dirname(__DIR__, 3) . '/docs/guides/overview.md');